DioGuardi, a songwriter who has written more than 100 hit singles, joined Randy Jackson, Paula Abdul and Simon Cowell on the judges' panel last year for the show's eighth season.
"I'm only here for one season," DioGuardi said in May of her possible return. "That's what we've discussed. So we'll see what happens."
DioGuardi may now know what's happening with her, but Abdul is still unsure if she'll be back on the show -- though Cowell has spoken out in support of his costar.